package com.cqupt.tr.component.filter;

import com.cqupt.tr.component.JwtTokenUtils;
import com.cqupt.tr.Utils.ObjectJsonTransFunction;

import com.cqupt.tr.bean.BaseMessage;

import com.cqupt.tr.bean.LoginUser;
import com.fasterxml.jackson.databind.ObjectMapper;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;

import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;



public class JWTAuthenticationFilter extends UsernamePasswordAuthenticationFilter {

//    private ThreadLocal<Integer> rememberMe = new ThreadLocal<>();
    private AuthenticationManager authenticationManager;
    public JWTAuthenticationFilter(AuthenticationManager authenticationManager) {
        this.authenticationManager = authenticationManager;
        super.setFilterProcessesUrl("/auth/login");
    }

    @Override
    public Authentication attemptAuthentication(HttpServletRequest request,
                                                HttpServletResponse response) throws AuthenticationException {

        // 从输入流中获取到登录的信息
        try {
            LoginUser loginUser = new ObjectMapper().readValue(request.getInputStream(), LoginUser.class);
            return authenticationManager.authenticate(
                    new UsernamePasswordAuthenticationToken(loginUser.getUsername(), loginUser.getPassword(), new ArrayList<>())
            );
        } catch (IOException e) {
            e.printStackTrace();
            return null;

        }
    }

    // 成功验证后调用的方法
    // 如果验证成功，就生成token并返回
//    @Override
//    protected void successfulAuthentication(HttpServletRequest request,
//                                            HttpServletResponse response,
//                                            FilterChain chain,
//                                            Authentication authResult) throws IOException, ServletException {
//
//
//        BaseMessage baseMessage = new BaseMessage();
//        baseMessage.setMsg("success");
//        baseMessage.setCode("0");
//        // 查看源代码会发现调用getPrincipal()方法会返回一个实现了`UserDetails`接口的对象
//        // 所以就是JwtUser啦
//        JwtUser jwtUser = (JwtUser) authResult.getPrincipal();
//        boolean isRemember = rememberMe.get() == 1;
//        String role = "";
//        System.out.println("jwtUser:" + jwtUser.toString());
//        Collection<? extends GrantedAuthority> authorities = jwtUser.getAuthorities();
//        for (GrantedAuthority authority : authorities){
//            role = authority.getAuthority();
//        }
//        String token = JwtTokenUtils.createToken(jwtUser.getUsername(),role ,isRemember);
// //       jedis.set(token,jwtUser.getUsername(),"nx","ex",3600*(isRemember?84:1));
//        // 返回创建成功的token
//        // 但是这里创建的token只是单纯的token
//        // 按照jwt的规定，最后请求的格式应该是 `Bearer token`
//        Map<String,String> map = new HashMap<>();
//        map.put("token",JwtTokenUtils.TOKEN_PREFIX + token);
//        baseMessage.setData(map);
////        jedis.close();
////        response.setHeader("token", JwtTokenUtils.TOKEN_PREFIX + token);
//        response.getWriter().write(ObjectJsonTransFunction.toJsonStr(map));
//    }

    // 这是验证失败时候调用的方法
//    @Override
//    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException, ServletException {
//        BaseMessage baseMessage = new BaseMessage();
//        baseMessage.setMsg("success");
//        baseMessage.setCode("0");
//        baseMessage.setData("authentication failed, reason: " + failed.getMessage());
//        response.getWriter().write(ObjectJsonTransFunction.toJsonStr(baseMessage));
//    }
}
